21035366 has 12 divisors (see below), whose sum is σ = 34682676. Its totient is φ = 9561420.

The previous prime is 21035359. The next prime is 21035389. The reversal of 21035366 is 66353012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43220 + ... + 43703.

It is an arithmetic number, because the mean of its divisors is an integer number (2890223).

Almost surely, 2^21035366 is an apocalyptic number.

21035366 is a deficient number, since it is larger than the sum of its proper divisors (13647310).

21035366 is a wasteful number, since it uses less digits than its factorization.

21035366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86947 (or 86936 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 21035366 is about 4586.4328186511. The cubic root of 21035366 is about 276.0472071461.

Adding to 21035366 its reverse (66353012), we get a palindrome (87388378).

The spelling of 21035366 in words is "twenty-one million, thirty-five thousand, three hundred sixty-six".